Question: A 73-percent efficient pump with a power input of 12 hp is pumping water from a lake to a nearby pool at a rate of

A 73-percent efficient pump with a power input of 12 hp is pumping water from a lake to a nearby pool at a rate of 1.2 ft3/s through a constant-diameter pipe, the free surface of the pool is 35 ft above that of the lake. Determine the mechanical power used to overcome frictional effects in piping.

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